Which condition of ocean water varies with the location and seasons?

Two examples of related sciences

What is the scientific notation of 18? Must be a number 1<_ M <10

Sodium metal reacts with water to produce hydrogen gas according to the following equation: 2Na (s) + 2H2O (l) 2NaOH (aq) + H2 (g) The product gas, H2, is collected over water at a temperature of 20 °C and a pressure of 754 mm Hg.

The greatest composition by mass in an atom of 17/8 O is due to the total mass of its A) electrons B) neutrons C) positrons D) protons

Cobalt-60 and iodine-131 are radioactive isotopes that are used in (1) dating geologic formations (2) industrial measurements (3) medical procedures (4) nuclear power

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?